Question: What are theprogramming language which start with the letter x
Paraphrase: What are theprogramming dialect which begin with the letter x
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q9143 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'x')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: XL, XL, X10, X10, Xtend, Xtend, XProc, XProc, XBase++, XBase++, x86 assembly language, x86 assembly language, XL, XL, XACML, XACML, XUpdate, XUpdate, XSLT, XSLT, XPath, XPath, XML User Interface Language, XML User Interface Language, xHarbour, xHarbour, XProfan, XProfan, XBLite, XBLite, XPL, XPL, X++, X++, XBasic, XBasic, XOTcl, XOTcl, XC, XC, XPL0, XPL0, XCore XS1, XCore XS1, XMTC, XMTC, XSB, XSB, Xojo, Xojo